CN111082905A

CN111082905A - Information receiving and sending method and device

Info

Publication number: CN111082905A
Application number: CN201811216839.3A
Authority: CN
Inventors: 刘显达; 张荻; 刘鹍鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-10-18
Filing date: 2018-10-18
Publication date: 2020-04-28
Anticipated expiration: 2038-10-18
Also published as: WO2020078173A1; US20210250206A1; EP3860091A1; CN113556220A; EP3860091A4; EP3860091B1; CN111082905B

Abstract

The application provides an information receiving and sending method and device. The method comprises the following steps: sending configuration information, wherein the configuration information is used for indicating a target Sounding Reference Signal (SRS) resource, the target SRS resource is associated with K channel state information reference signal (CSI-RS) resources, and K is an integer greater than 1; the K CSI-RS resources are used for determining a precoding mode adopted by an SRS loaded on the target SRS resource; receiving an SRS carried on the target SRS resource. The application improves transmission performance.

Description

Information receiving and sending method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to an information receiving and sending method and apparatus.

Background

Generally, a terminal may directly derive uplink channel information through downlink channel information, or a network device may directly derive downlink channel information through uplink channel information to obtain downlink channel information, which may be considered as having a channel reciprocity characteristic in a communication system, for example, a Time Division Duplex (TDD) system.

In the prior art, based on the channel reciprocity characteristic, the network device may not indicate the precoding mode to the terminal when scheduling the uplink data, that is, the uplink data may implement non-codebook transmission. In the non-codebook transmission process, the network device may send a channel state information reference signal (CSI-RS) to the terminal on a CSI-RS resource. The terminal can obtain downlink channel information according to the CSI-RS, and select a precoding mode based on which the SRS is transmitted on Sounding Reference Signal (SRS) resources corresponding to the CSI-RS resources one by one according to the downlink channel information.

However, the prior art has the problem of low transmission performance.

Disclosure of Invention

The application provides an information receiving and sending method and device, which are used for solving the problem of low transmission performance in the prior art.

In a first aspect, an embodiment of the present application provides an information receiving method, which is applied to a network device, and the method includes:

sending configuration information for indicating target SRS resources, wherein the target SRS resources are associated with K CSI-RS resources, and K is an integer greater than 1; the K CSI-RS resources are used for determining a precoding mode adopted by the SRS loaded on the target SRS resource; and, receiving the SRS carried on the target SRS resource.

In the above scheme, the network device is used for indicating the configuration information of the target SRS resource, the target SRS resource is associated with K CSI-RS resources, K is an integer greater than 1, and the K CSI-RS resources are used for the terminal to determine the precoding mode adopted by the SRS carried on the target SRS resource, so that the terminal determines the precoding mode adopted by the SRS carried on the target SRS resource by comprehensively considering the mutual influence of the CSI-RSs carried on the plurality of CSI-RS resources, and thus the precoding mode with better transmission performance can be selected, and the transmission performance is improved.

In one possible implementation, the precoding manner adopted by the SRS carried on the target SRS resource is determined based on the first determination manner or the second determination manner. Wherein, the first determination mode is as follows: the precoding mode adopted by the SRS carried on the target SRS resource is determined based on CSI-RS representation channel measurement information carried on a first target resource and CSI-RS representation interference information carried on a second target resource, wherein the first target resource is one CSI-RS resource in K CSI-RS resources, and the second target resource is all the other CSI-RS resources except the first target resource in the K CSI-RS resources. The second determination method is as follows: and determining a precoding mode adopted by the SRS carried on the target SRS resource based on CSI-RS characterization channel measurement information carried on a third target resource, wherein the third target resource is one CSI-RS resource in the K CSI-RS resources.

In the above scheme, the first determination mode may determine that the SRS precoding mode is transmitted to multiple network devices based on the target SRS resource, and the second determination mode may determine that the SRS precoding mode is transmitted to a single network device based on the target SRS resource.

In one possible implementation, the target SRS resource includes a plurality of SRS resources. Here, by the target SRS resource including a plurality of SRS resources, it can be achieved that the plurality of SRS resources are associated with the same K CSI-RS resources. It should be noted that, when the target SRS resource includes a plurality of SRS resources, the plurality of SRS resources all determine the precoding manner by using the first determining manner, or the plurality of SRS resources all determine the precoding manner by using the second determining manner.

In a possible implementation, the configuration information is further used to indicate K transmission parameters corresponding to the target SRS resource, and the SRS carried on the target SRS resource is transmitted based on one target transmission parameter of the K transmission parameters.

In the above scheme, the target SRS resource corresponds to K transmission parameters, so that after the terminal determines the SRS precoding mode, the terminal can determine the transmission parameters matched with the precoding mode (where the transmission parameters matched with the precoding mode can be understood as the transmission parameters capable of ensuring the SRS transmission performance) from the K transmission parameters to transmit the SRS, thereby ensuring the SRS transmission performance.

In one possible implementation, the K transmission parameters correspond one-to-one to the K CSI-RS resources.

In the above scheme, the K transmission parameters correspond to the K CSI-RS resources one to one, so that after the terminal determines the SRS precoding mode according to the K CSI-RS resources, the terminal can transmit the SRS by using the transmission parameters corresponding to the CSI-RS resources corresponding to the precoding mode as the transmission parameters matched with the precoding mode, thereby ensuring the SRS transmission performance.

In one possible implementation, the target transmission parameter is a transmission parameter corresponding to a target resource in the K CSI-RS resources, and the target resource carries a CSI-RS representing channel measurement information.

In one possible implementation, the method further comprises:

and sending K DCIs in one-to-one correspondence with the K CSI-RS resources, wherein the K DCIs are used for indicating the trigger terminal to send the SRS on the target SRS resource.

In the above scheme, by transmitting K pieces of DCI, the terminal is triggered to transmit the SRS on the target SRS resource whose time domain type is aperiodic.

In one possible implementation, the K DCIs are also used to instruct the trigger terminal to receive CSI-RS on the corresponding CSI-RS resource.

In one possible implementation, K DCIs are carried in the same time unit; and the precoding mode adopted by the SRS carried on the target SRS resource is determined based on the first determination mode. Here, by the first determination method, when the K pieces of DCI are carried in the same time unit, the determination of the precoding method used for carrying the SRS on the target SRS resource whose time domain type is aperiodic can be achieved.

In one possible implementation, the K DCIs are carried in different time units; and the precoding mode adopted by the SRS carried on the target SRS resource is determined based on the second determination mode. Here, by the second determination method, when the K pieces of DCI are carried in different time units, a determination of a precoding method used for carrying the SRS on the target SRS resource whose time domain type is aperiodic can be achieved.

In one possible implementation, the configuration information is specifically used to indicate an SRS resource set including N SRS resources; the N SRS resources include target SRS resources, the N SRS resources are associated with M CSI-RS resources, and the M CSI-RS resources include K CSI-RS resources. Wherein N is a positive integer, and M is a positive integer less than or equal to K.

In the above scheme, the target SRS resource belongs to the SRS resource set, so that the network device can manage the target SRS resource in a set unit, thereby improving the flexibility of target SRS resource management and reducing the complexity of configuration information indication.

In one possible implementation, K is equal to M, and each SRS resource in the set of SRS resources is associated with K CSI-RS resources.

In a second aspect, an embodiment of the present application provides an information sending method, which is applied to a terminal, and the method includes:

receiving configuration information for indicating target SRS resources, wherein the target SRS resources are associated with K channel state information reference signal (CSI-RS) resources, and K is an integer greater than 1; the K CSI-RS resources are used for the terminal to determine a precoding mode adopted by the SRS carried on the target SRS resource; determining a precoding mode adopted by the SRS loaded on the target SRS resource according to the CSI-RSs respectively loaded on the K CSI-RSs; and, transmitting the SRS on the target SRS resource according to the determined precoding mode.

In the above scheme, by receiving configuration information for indicating a target SRS resource, the target SRS resource associates K CSI-RS resources, where K is an integer greater than 1, determines a precoding manner adopted by an SRS carried on the target SRS resource according to the K CSI-RS resources, and sends the SRS on the target SRS resource according to the determined precoding manner, the terminal determines the precoding manner adopted by the SRS carried on the target SRS resource by comprehensively considering mutual influences of CSI-RSs carried on a plurality of CSI-RS resources, so that a precoding manner enabling better transmission performance can be selected, and transmission performance is improved.

In one possible implementation, the precoding method adopted by the SRS carried on the target SRS resource is determined according to the CSI-RSs carried on the K CSI-RSs, respectively, and includes the following determination method one or determination method two. Wherein, the first determination mode is as follows: the method comprises the steps that channel measurement information is represented on the basis of CSI-RS borne on a first target resource, and a precoding mode adopted by an SRS borne on the target SRS resource is determined according to CSI-RS represented interference information borne on a second target resource, wherein the first target resource is one CSI-RS resource in K CSI-RS resources, and the second target resource is all the other CSI-RS resources except the first target resource in the K CSI-RS resources; the second determination method is as follows: and determining a precoding mode adopted by the SRS carried on the target SRS resource based on the CSI-RS characterization channel measurement information carried on the third target resource, wherein the third target resource is one CSI-RS resource in the K CSI-RS resources.

In one possible implementation, the target SRS resource includes a plurality of SRS resources.

In one possible implementation, the configuration information is further used to indicate K transmission parameters corresponding to the target SRS resource;

correspondingly, the transmitting the SRS on the target SRS resource according to the determined precoding method includes: and sending the SRS on the target SRS resource according to the determined precoding mode and one target transmission parameter in the K transmission parameters.

In one possible implementation, before transmitting the SRS on the target SRS resource, the method further includes:

and receiving K DCIs corresponding to the K CSI-RS resources one by one, wherein the K DCIs are used for indicating the trigger terminal to send the SRS on the target SRS resource.

In one possible implementation, K DCIs are carried in the same time unit; and determining the precoding mode adopted by the SRS carried on the target SRS resource based on the first determination mode.

In one possible implementation, the K DCIs are carried in different time units; and determining the precoding mode adopted by the SRS carried on the target SRS resource based on the second determination mode.

In one possible implementation, the configuration information is specifically used to indicate an SRS resource set including N SRS resources, the N SRS resources include a target SRS resource, the N SRS resources are associated with M CSI-RS resources, the M CSI-RS resources include K CSI-RS resources, N is a positive integer, and M is a positive integer less than or equal to K.

In a third aspect, an embodiment of the present application provides an information receiving apparatus, which is applied to a network device, and the apparatus includes: the device comprises a sending module and a receiving module. The device comprises a sending module, a receiving module and a sending module, wherein the sending module is used for sending configuration information used for indicating target SRS resources, the target SRS resources are associated with K channel state information reference signal CSI-RS resources, and K is an integer larger than 1; the K CSI-RS resources are used for determining a precoding mode adopted by the SRS carried on the target SRS resource. A receiving module, configured to receive an SRS carried on the target SRS resource.

In a possible implementation, the sending module is further configured to send K pieces of DCI corresponding to the K CSI-RS resources one to one, where the K pieces of DCI are used to instruct the trigger terminal to send the SRS on the target SRS resource.

In one possible implementation, K DCIs are carried in the same time unit; and the precoding mode adopted by the SRS carried on the target SRS resource is determined based on the first determination mode.

In one possible implementation, the K DCIs are carried in different time units; and the precoding mode adopted by the SRS carried on the target SRS resource is determined based on the second determination mode.

In one possible implementation, the configuration information is specifically used to indicate an SRS resource set including N SRS resources; the N SRS resources include target SRS resources, the N SRS resources are associated with M CSI-RS resources, the M CSI-RS resources include K CSI-RS resources, N is a positive integer and M is a positive integer less than or equal to K.

In a fourth aspect, an embodiment of the present application provides an information sending apparatus, which is applied to a terminal, and includes: the device comprises a receiving module, a processing module and a sending module. The receiving module is used for receiving configuration information used for indicating SRS resources, the target SRS resources are associated with K channel state information reference signal CSI-RS resources, and K is an integer larger than 1; the K CSI-RS resources are used for the terminal to determine a precoding mode adopted by the SRS carried on the target SRS resource. And the processing module is used for determining a precoding mode adopted by the SRS carried on the target SRS resource according to the CSI-RSs respectively carried on the K CSI-RSs. And a sending module, configured to send the SRS on the target SRS resource according to the determined precoding manner.

In one possible implementation, the precoding method adopted by the SRS carried on the target SRS resource is determined according to the CSI-RSs carried on the K CSI-RSs, respectively, and includes the following determination method one or determination method two. Wherein, the first determination mode is as follows: the method comprises the steps that channel measurement information is represented on the basis of CSI-RS borne on a first target resource, and a precoding mode adopted by an SRS borne on the target SRS resource is determined according to CSI-RS represented interference information borne on a second target resource, wherein the first target resource is one CSI-RS resource in K CSI-RS resources, and the second target resource is all the other CSI-RS resources except the first target resource in the K CSI-RS resources. The second determination method is as follows: and determining a precoding mode adopted by the SRS carried on the target SRS resource based on the CSI-RS characterization channel measurement information carried on the third target resource, wherein the third target resource is one CSI-RS resource in the K CSI-RS resources.

In one possible implementation, the configuration information is further used to indicate K transmission parameters corresponding to the target SRS resource; correspondingly, the sending module is specifically configured to send the SRS on the target SRS resource according to the determined precoding manner and one target transmission parameter of the K transmission parameters.

In a possible implementation, the receiving module is further configured to receive K pieces of DCI corresponding to the K pieces of CSI-RS resources one to one, where the K pieces of DCI are used to instruct the trigger terminal to transmit the SRS on the target SRS resource.

In one possible implementation, K DCIs are carried in the same time unit; and determining the precoding mode adopted by the SRS carried on the target SRS resource according to the first determination mode.

In one possible implementation, the K DCIs are carried in different time units; and determining the precoding mode adopted by the SRS carried on the target SRS resource according to the second determination mode.

In one possible implementation, the configuration information is specifically used to indicate that an SRS resource set including N SRS resources includes N SRS resources including a target SRS resource, the N SRS resources are associated with M CSI-RS resources, the M CSI-RS resources include K CSI-RS resources, N is a positive integer, and M is a positive integer less than or equal to K.

In a fifth aspect, an embodiment of the present invention provides a network device, where the network device has a function of implementing a behavior of the network device in the foregoing method. The functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions.

In one possible design, the network device includes a processor and a transceiver in its structure, and the processor is configured to support the network device to perform the corresponding functions in the above method. The transceiver is used for supporting communication between the network device and the terminal, transmitting information related to the method to the terminal, or receiving signals related to the method from the terminal. The network device may also include a memory, coupled to the processor, that stores program instructions and data necessary for the network device.

In a sixth aspect, an embodiment of the present invention provides a terminal, where the terminal has a function of implementing a terminal behavior in the above method design. The functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions. The modules may be software and/or hardware.

In one possible design, the structure of the terminal includes a transceiver and a processor, and the transceiver is configured to support the terminal to receive the configuration information transmitted by the network device, or to support the terminal to transmit the SRS to the network device, and the like. And the processor determines a precoding mode adopted by the SRS loaded on the target SRS resource according to the CSI-RSs respectively loaded on the K CSI-RSs.

In a seventh aspect, an embodiment of the present application provides an information receiving apparatus, which includes a unit, a module, or a circuit for performing the method provided in the first aspect or each possible implementation manner of the first aspect. The information receiving apparatus may be a network device, or may be a module applied to the network device, for example, a chip applied to the network device.

In an eighth aspect, an embodiment of the present application provides an information sending apparatus, including a unit, a module, or a circuit for executing the method provided in the second aspect or each possible implementation manner of the second aspect. The information transmitting apparatus may be a terminal, or may be a module applied to a terminal, for example, a chip applied to a terminal.

In a ninth aspect, embodiments of the present application provide a computer-readable storage medium for storing a computer program or instructions, which when run on a computer, causes the computer to perform the method of any one of the above first aspects.

In a tenth aspect, embodiments of the present application provide a computer-readable storage medium for storing a computer program or instructions, which when run on a computer, causes the computer to perform the method of any one of the second aspects above.

In an eleventh aspect, embodiments of the present application provide a computer program product, which when run on a computer, causes the computer to perform the method according to any one of the first aspect.

In a twelfth aspect, embodiments of the present application provide a computer program product, which when run on a computer causes the computer to perform the method according to any of the second aspects above.

Drawings

Fig. 1 is a schematic view of an application scenario according to an embodiment of the present application;

FIGS. 2A-2C are diagrams of non-codebook transmissions in the prior art;

fig. 3A and 3B are schematic diagrams of CoMP transmission in the prior art;

fig. 4A and 4B are schematic diagrams of non-codebook transmission when the number of network devices is 2 in the prior art;

FIG. 5A is a diagram illustrating SRS resource allocation in the prior art;

FIG. 5B is a diagram illustrating SRS transmission based on the SRS resource configuration of FIG. 5A in the prior art;

fig. 6 is a schematic flowchart of an information receiving and sending method according to an embodiment of the present application;

fig. 7A and fig. 7B are schematic diagrams of SRS resource configurations provided in an embodiment of the present application;

fig. 8A and fig. 8B are schematic diagrams illustrating determining a precoding manner according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of an information receiving apparatus according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of an information sending apparatus according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of an information receiving apparatus according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of an information sending apparatus according to an embodiment of the present application.

Detailed Description

Fig. 1 is a schematic view of an application scenario of an embodiment of the present application, and as shown in fig. 1, the application scenario of the embodiment may include: network equipment and a terminal. When the network device schedules the uplink data, the network device may not indicate the precoding mode to the terminal, that is, the non-codebook transmission of the uplink data may be performed between the network device and the terminal. The network equipment can configure a target SRS resource to the terminal, the target SRS resource can be associated with a plurality of CSI-RS resources, and the plurality of CSI-RS resources are used for the terminal to determine a precoding mode adopted by an SRS carried on the target SRS resource.

Optionally, the precoding manner may be indicated by a precoding matrix.

Optionally, the number of the network devices may be one, and the multiple CSI-RS resources all correspond to one network device, that is, the CSI-RS on the multiple CSI-RS resources are all sent by the network device. And, the network device includes multiple antenna groups, and different CSI-RS resources may correspond to different antenna groups.

Optionally, the number of the network devices may be multiple (that is, greater than 1), and the multiple CSI-RS resources may correspond to the multiple network devices, that is, the CSI-RS on one CSI-RS resource is sent by the network device corresponding to the CSI-RS resource. Further optionally, different CSI-RS resources may correspond to different network devices.

When the number of the network devices is multiple, all the network devices may serve as a cooperation set, the terminal may communicate with the network devices in the cooperation set at the same time, and information interaction may be performed between the network devices in the cooperation set.

The network device may include a base station or a Transmission Reception Point (TRP), where the base station may be an evolved node b (eNB) in a Long Term Evolution (LTE) system, or a base station in a fifth generation (5G) mobile communication system (also referred to as a new radio, NR) may be referred to as a 5G base station (gnnodeb, gNB), or a relay station, or a vehicle-mounted device, a wearable device, and an access network device in a future 5G network or an access network device in a future evolved Public Land Mobile Network (PLMN) network, and the like.

The terminal, which may also be referred to as a user equipment, may include but is not limited to a user equipment (CPE), a smart phone (such as an Android phone, an IOS phone, and the like), a multimedia device, a streaming media device, a personal computer, a tablet computer, a palmtop computer, a Mobile Internet Device (MID) or a wearable smart device, an internet device such as a vehicle-mounted device, and the like.

The principle that when the network device schedules uplink data, the precoding mode is not indicated to the terminal is explained as follows:

step 1, the network device may configure an SRS resource and a CSI-RS resource associated with the SRS resource for the terminal.

Step 2, as shown in fig. 2A, the network device sends the CSI-RS on the time-frequency resource of the CSI-RS resource associated with the SRS resource, and the terminal receives the CSI-RS on the corresponding time-frequency resource and determines the precoding mode based on the channel reciprocity assumption and the received CSI-RS.

Step 3, assuming that the number of precoding manners determined by the terminal is 4, as shown in fig. 2B, the terminal transmits the SRS on the SRS resource associated with the CSI-RS resource through 4 antenna beams (e.g.,

antenna beams

1, 2, 3, and 4) in different directions according to the determined precoding manner, and the network device receives and measures the SRS on the SRS resource to obtain uplink channel information, where the number of precoding manners may be determined according to the instruction of the base station.

Step 4, the network device may determine, according to the SRS in 4 different antenna beam directions, a time-frequency resource and a transmission scheme used by the scheduling terminal to transmit a Physical Uplink Shared Channel (PUSCH), and indicate, as shown in fig. 2C, Downlink Control Information (DCI) signaling carried in a Physical Downlink Control Channel (PDCCH) to the terminal. The transmission scheme may include beam information used by the terminal to transmit the PUSCH, an SRS resource selection Indicator (SRI), a Modulation and Coding Scheme (MCS), antenna port indication information, and the like. The SRIs correspond to the precoding manners one to one, and the SRIs included in the transmission scheme are used to indicate, to the terminal, an antenna beam (e.g., antenna beam 2) to be used for PUSCH transmission.

And step 5, after receiving the DCI, the terminal transmits the PUSCH according to the precoding mode corresponding to the SRI indication.

It can be seen that, in steps 1 to 5, the network device and the terminal do not directly indicate the precoding method to be adopted, and therefore, the transmission is non-codebook transmission. It should be noted that, in the embodiment of the present application, the method may mainly be directed to step 1 to step 3 among the above step 1 to step 5.

In CoMP transmission, according to information interaction delay between network devices, the CoMP transmission can be divided into an ideal backhaul (ideal backhaul) and a non-ideal backhaul (non-ideal backhaul).

In the Ideal backhaul scene, the interaction delay between the network devices is negligible. At this time, it may be considered that there is one serving network device (e.g., serving transmission point (serving trp)/serving cell) among the network devices in the cooperation set, the serving network device is configured to perform scheduling decision for data communication for the terminal, perform Medium Access Control (MAC) layer and physical layer communication with the terminal, such as determining time-frequency resources of a control channel (e.g., PDCCH) and a data channel (e.g., PUSCH/PDSCH) of the terminal according to the scheduling decision, transmit DCI signaling in the PDCCH, transmit data in the PUSCH/PDSCH, and so on. The remaining network devices within the cooperation set, except for the serving network device, are referred to as cooperating network devices (e.g., cooperating transmission points (cooperating TRPs)/cooperating cells (cooperating TRPs)), and the cooperating network devices are configured to perform physical layer communication with the terminal according to a scheduling decision of the serving network device, such as transmitting DCI signaling in PDCCH, receiving/transmitting data in PUSCH/PDSCH, and so on. It can be seen that the Ideal backhaul scenario can support 1 DCI for uplink scheduling. Taking the number of network devices in the coordinated set as 2 as an example, as shown in fig. 3A, all configuration and scheduling information for the terminal to transmit PUSCH1 to network device 1 and for the terminal to transmit PUSCH2 to network device 2 are included in DCI 1.

In a non-ideal backhaul scenario, the interaction delay may be 2 to 5 milliseconds (ms), and may even reach 50ms, due to the large delay between network devices. At this time, if the scenario is the same as the Ideal backhaul scenario, the framework of the cooperative network device is still controlled by the service network device in the cooperative set, and the performance of the entire system is affected due to failure of the scheduling information caused by interaction delay. Therefore, in a non-ideal backhaul scenario, a mechanism for each network device in a coordinated set to independently schedule data and Reference Signals (RSs) of the terminal is introduced. And, each network device needs to support to independently indicate DCI, and when multiple network devices simultaneously schedule a terminal according to their respective scheduling decisions, the terminal receives multiple DCIs at the same time and can perform uplink transmission according to the multiple DCIs. Taking the number of network devices as 2 as an example, as shown in fig. 3B, all configuration and scheduling information for the terminal to transmit PUSCH1 to network device 1 are included in DCI1, and all configuration and scheduling information for the terminal to transmit PUSCH2 to network device 2 are included in DCI 2.

At present, when the number of network devices is 2, and CSI-RS resource 1 corresponds to network device 1, and CSI-RS resource 2 corresponds to network device 2, the above steps 2 to 3 may be specifically as shown in fig. 4A-4B. Specifically, as shown in fig. 4A, first, the network device 1 sends a CSI-RS to the terminal on the CSI-RS resource 1, the network device 2 sends a CSI-RS to the terminal on the CSI-RS resource 2, the terminal determines, according to the CSI-RS received on the CSI-RS resource 1, a precoding manner to be used for sending an SRS on one SRS resource (which may be denoted as SRS resource 1) associated with the CSI-RS resource 1, and determines, according to the CSI-RS received on the CSI-RS resource 2, a precoding manner to be used for sending an SRS on one SRS resource (which may be denoted as SRS resource 2) associated with the CSI-RS resource 2. Then, as shown in fig. 4B, assuming that the number of precoding schemes determined by the terminal based on each CSI-RS measurement is 4, as shown in fig. 4B, the terminal transmits SRS on SRS resource 1 corresponding to 4 antenna beams in different directions (e.g.,

antenna beams

1, 2, 3, 4) according to the precoding scheme determined by the measurement of CSI-RS resource 1, and transmits SRS on SRS resource 2 corresponding to 4 antenna beams in different directions (e.g.,

antenna beams

5, 6, 7, 8) according to the precoding scheme determined by the measurement of CSI-RS resource 2.

In addition, currently, in some special scenarios (e.g., non-ideal backhaul scenario of CoMP transmission), one SRS resource set (SRS resource set) may be associated with one CSI-RS resource, and the SRS resource set includes multiple SRS resources.

For example, assuming that the number of network devices in the application scenario shown in fig. 1 is 2, and the network devices are respectively a network device 1 and a network device 2, as shown in fig. 5A, the network device 1 configures an SRS resource set 1, the network device 2 configures an SRS resource set 2, the SRS resource set 1 may include SRS resources 1 to 4, and the SRS resource set 2 may include SRS resources 5 to 7. As shown in fig. 5A, the SRS resource set 1 is associated with the CSI-RS resource 1, and each SRS resource in the SRS resource set 1 corresponds to the same power control parameter and spatial filter parameter, and the SRS resource set 2 is associated with the CSI-RS resource 2, and each SRS resource in the SRS resource set 2 corresponds to the same power control parameter and spatial filter parameter.

The power control parameter corresponding to one SRS resource may be used for the terminal to determine the transmission power used for transmitting the SRS on the SRS resource. Alternatively, the terminal may determine the transmission power p used for transmitting the SRS based on the following formula (1)_SRS：

p_SRS＝p_{O_SRS}+10log₁₀(2^μ×M_SRS)+α_SRSX PL formula (1)

Wherein p is_{O_SRS}、α_SRSThe three parameters, namely the above-mentioned open-loop parameters, correspond to the basic open-loop working point, the network device can configure the three parameters, and the terminal can determine the power value for sending the SRS based on the three parameters; 10log₁₀(2^μ×M_SRS) Represents an offset bandwidth factor, determined according to the transmission bandwidth of the SRS.

Further, as shown in fig. 5B, the network device 1 determines, according to the CSI-RS received on the CSI-RS resource 1, a precoding manner for transmitting the SRS on each SRS resource in the SRS resource set 1, and the network device 2 determines, according to the CSI-RS received on the CSI-RS resource 2, a precoding manner for transmitting the SRS on each SRS resource in the SRS resource set 2.

It can be seen that, at present, one SRS resource is associated with one CSI-RS resource, for each CSI-RS resource in the multiple CSI-RS resources, the terminal determines a precoding manner for the SRS resource corresponding to the CSI-RS resource based on the CSI-RS carried on each CSI-RS resource, and sends the SRS on the SRS resource corresponding to the CSI-RS resource based on the determined precoding manner, without comprehensively considering the mutual influence of the CSI-RS carried on the multiple CSI-RS resources, and therefore, there is a problem that the determined precoding manner is not optimal due to not comprehensively considering the mutual influence of the CSI-RS carried on the multiple CSI-RS resources, resulting in lower transmission performance.

It should be noted that in fig. 2A-5B, one petal may represent one antenna beam.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Fig. 6 is a flowchart illustrating an information receiving and sending method according to an embodiment of the present application. As shown in fig. 6, the method of this embodiment may include:

step 601, the network device sends configuration information, where the configuration information is used to indicate a target SRS resource.

In this step, the target SRS resource associates K CSI-RS resources, where K is an integer greater than 1; and the K CSI-RS resources are used for the terminal to determine the precoding mode adopted by the SRS loaded on the target SRS resource. Optionally, K may be less than or equal to the number of network devices in the application scenario shown in fig. 1. When K is equal to the number of network devices in the application scenario shown in fig. 1, it may be indicated that different CSI-RS resources in the application scenario correspond to different network devices. When K is greater than the number of network devices in the application scenario shown in fig. 1, it may be indicated that a plurality of CSI-RS resources in the application scenario correspond to different antenna groups of one network device.

Optionally, when the number of the network devices in fig. 1 is multiple, at least one of all the network devices sends the configuration information. Optionally, the network device may send the configuration information through Radio Resource Control (RRC) signaling or medium access control-control element (MAC-CE).

Optionally, the configuration information may be specifically used to indicate the number of ports, the time domain position, the frequency domain position, and the code word of the target SRS resource.

Optionally, according to the characteristics of the time domain, the time domain type of the target SRS resource may be periodic or aperiodic. When the time domain type of the target SRS resource is a periodic type, the configuration information may include a time unit level period and a time unit level offset, and after the network device configures the target SRS resource, the terminal may transmit the SRS on the target SRS resource in a time unit of a specific period indicated by the time unit level period and the time unit level offset. When the time domain type of the target SRS resource is an aperiodic type, the configuration information may not include a time unit level period and a time unit level offset, after the target SRS resource is configured, the network device may send DCI in a certain time unit, where the DCI may be used to indicate triggering of the target SRS resource, and the terminal may send SRS on the target SRS resource by using the time unit where the DCI is located as a reference and according to a pre-configured time unit offset, for example, if the DCI indicates in a time unit n, and the pre-configured time unit offset is k, the terminal may send SRS on the target SRS resource of time unit n + k.

Optionally, the target SRS resource may include one or more SRS resources. When the target SRS resource includes a plurality of SRS resources, it may be indicated that the plurality of SRS resources are all associated with the same K CSI-RS resources. Here, when the number of the network devices in fig. 1 is multiple, the multiple SRS resources may correspond to all the network devices, and further optionally, the multiple SRS resources may correspond to all the network devices one to one. Optionally, any one of all the network devices may send, to the terminal, configuration information for indicating the target SRS resource; or, each of the network devices sends, to the terminal, configuration information for indicating a part of SRS resources in the target SRS resources, and the terminal combines the configuration information sent by all the network devices, respectively, to obtain the configuration information for indicating the target SRS resources.

Optionally, the target SRS resource may correspond to K transmission parameters. Further optionally, the transmission parameters may include power control parameters, spatial filtering parameters, and the like. Wherein, the power control parameters are as follows: based on different channel characteristics (e.g., path loss and/or signal-to-noise ratio, etc.) of different transmission links, different SRS transmission powers can be configured (e.g., when the path loss is high or the signal-to-noise ratio is low, a larger transmission power is generally used, and conversely, when the path loss is low or the signal-to-noise ratio is high, a smaller transmission power is generally used). Spatial filtering parameters: each transmission link determines an optimal transmit-receive beam pair through a beam training process, and the transmit-receive beam pairs are aligned in the spatial direction, so that the receiving performance is ensured. Here, the target SRS resource corresponds to K transmission parameters, so that after determining the SRS precoding mode, the terminal can determine, from the K transmission parameters, transmission parameters matched with the precoding mode (where the transmission parameters matched with the precoding mode can be understood as transmission parameters capable of ensuring the SRS transmission performance) to transmit the SRS, thereby ensuring the SRS transmission performance.

Further optionally, the K transmission parameters correspond to the K CSI-RS resources one to one. Here, the K transmission parameters correspond to the K CSI-RS resources one to one, so that after the terminal determines the SRS precoding mode according to the K CSI-RS resources, the terminal can transmit the SRS by using the transmission parameters corresponding to the CSI-RS resources corresponding to the precoding mode as the transmission parameters matched with the precoding mode, thereby ensuring the SRS transmission performance.

It should be noted that the K transmission parameters corresponding to the target SRS resource may be configured through the configuration information, or may be configured through other information 1 besides the configuration information, which is not limited in this application. The configuration information or other information may be indicated by RRC signaling, MAC-CE signaling, or RRC signaling combined with MAC-CE, for example. Taking the configuration information combining with the MAC-CE indication through RRC signaling as an example, the configuration information set including the configuration information may be indicated through RRC signaling, and then the configuration information is selected from the configuration information set through MAC-CE.

It should be noted that, the association relationship between the target SRS resource and the K CSI-RS resources may be configured through the configuration information, or may be configured through other information 2 besides the configuration information, which is not limited in this application. Here, the specific manner of indicating the configuration information and the other information 2 by the network device may refer to the foregoing description, and is not described herein again. The other information 2 may be the same information as the other information 1 or different information, and the present application does not limit this.

Optionally, the configuration information may specifically indicate an SRS resource set, where the SRS resource set includes N SRS resources, the N SRS resources include the target SRS resource, the N SRS resources are associated with M CSI-RS resources, the M CSI-RS resources include the K CSI-RS resources, N is a positive integer, and M is a positive integer smaller than or equal to K. It should be noted that, one or more CSI-RS resources may be associated with each SRS resource in the other SRS resources except the target SRS resource among the N SRS resources. Here, the target SRS resource belongs to the SRS resource set, so that the network device can manage the target SRS resource in a set unit, thereby improving the flexibility of target SRS resource management and reducing the complexity of configuration information indication.

Further optionally, when M is equal to K and the N SRS resources are all target SRS resources, the specific configuration manner of the association relationship between the N SRS resources and the M CSI-RS resources may be: the base station indicates the association between the M CSI-RS resources and the SRS resource set through signaling, and represents that each SRS resource in the SRS resource set is associated with the M CSI-RS resources, or indicates the association between each SRS resource in the N SRS resources and the CSI-RS resources in the M CSI-RS resources through signaling.

Further optionally, the configuration information is used to indicate a target SRS resource, and specifically includes: the configuration information is used to indicate the set of SRS resources.

Further optionally, K is equal to M, and each SRS resource in the set of SRS resources is associated with the K CSI-RS resources. Here, by setting K equal to M and associating each SRS resource in the set of SRS resources with the K CSI-RS resources, it is achieved that each SRS resource in the set of SRS resources is associated with the same K CSI-RS resources. For example, assuming that the number of network devices in the application scenario shown in fig. 1 is 2, the network devices are respectively a network device 1 and a network device 2, and each network device corresponds to one CSI-RS resource, as shown in fig. 7A, an SRS resource set 1 configured by the network device 1 and the network device 2 together may include SRS resources 1 to 4, the SRS resource set 1 may associate the CSI-RS resource 1 in which the network device 1 sends CSI-RS to the terminal and the CSI-RS resource 2 in which the network device 2 sends CSI-RS to the terminal, and the CSI-RS resource 1 may correspond to a power control parameter 1 and a spatial filter parameter 1, and the CSI-RS resource 2 may correspond to the power control parameter 2 and the spatial filter parameter 2.

The number of SRS resource sets may be one or more. For example, assuming that the number of network devices in the application scenario shown in fig. 2 is 2, which are network device 1 and network device 2, and each network device corresponds to one CSI-RS resource, as shown in fig. 7B, network device 1 and network device 2 may configure SRS resource set 1 and SRS resource set 2 together. The SRS resource set 1 may include SRS resources 1 to 4, the SRS resource set 1 may associate a CSI-RS resource 1 in which the network device 1 sends a CSI-RS to the terminal and a CSI-RS resource 2 in which the network device 2 sends a CSI-RS to the terminal, and the CSI-RS resource 1 may correspond to the power control parameter 1 and the spatial filtering parameter 1, and the CSI-RS resource 2 may correspond to the power control parameter 2 and the spatial filtering parameter 2. The SRS resource set 2 may include SRS resources 5 to 8, the SRS resource set 2 may associate CSI-RS resources 3 for the network device 1 to send CSI-RS to the terminal and CSI-RS resources 4 for the network device 2 to send CSI-RS to the terminal, and the CSI-RS resources 3 may correspond to the power control parameters 3 and the spatial filtering parameters 3, and the CSI-RS resources 4 may correspond to the power control parameters 4 and the spatial filtering parameters 4.

Optionally, when the K CSI-RS resources correspond to multiple network devices, the corresponding relationship between the network devices and the CSI-RS resources may be characterized by receiving beam indication information in configuration information of the CSI-RS resources, where the receiving beam indication information is used to indicate a terminal to receive a receiving beam adopted by the CSI-RS. Different network devices have different physical positions and channel conditions, corresponding optimal receiving and transmitting beams are different when different network devices communicate with the terminal, and receiving beam indication information in configuration information of different CSI-RS resources is different, which means that different CSI-RS resources correspond to different network devices. Alternatively, the receive beam indication information may be characterized by quasi-co-location (QCL) information.

Step 602, the terminal receives the configuration information.

In this step, specifically, the terminal may receive the configuration information from the network device. For specific content of the configuration information, reference may be made to the relevant description in step 601, which is not described herein again.

Step 603, the terminal determines a precoding manner adopted by the SRS loaded on the target SRS resource according to the CSI-RSs loaded on the K CSI-RS resources, respectively.

In this step, when determining the precoding manner adopted by the SRS carried on the target SRS resource, the terminal may assume that measurement is performed based on CSI-RSs carried on the K CSI-RS resources, respectively. The terminal determines the precoding mode adopted by the SRS carried on the target resource according to the CSI-RSs respectively carried on the K CSI-RS resources, so that the terminal determines the precoding mode adopted by the SRS carried on the target SRS resource by comprehensively considering the mutual influence of the CSI-RSs carried on the multiple CSI-RS resources, the precoding mode with better transmission performance can be selected, and the transmission performance is improved.

Specifically, first, the terminal may determine a plurality of covariance matrices according to CSI-RSs respectively carried on the K CSI-RS resources. Then, the terminal may determine a plurality of precoding manners from the determined plurality of covariance matrices (for example, a precoding manner may be obtained by extracting eigenvectors through Singular Value Decomposition (SVD) decomposition). Then, the precoding scheme with the best channel state is determined from the plurality of precoding schemes according to channel state parameters (e.g., signal to interference plus noise ratio (SINR) and/or Signal Noise Ratio (SNR) and/or throughput (throughput)) corresponding to the plurality of precoding schemes. Wherein the covariance matrix may include: a channel covariance matrix; or, a channel covariance matrix and an interference covariance matrix.

Here, the precoding mode with the best channel state is a precoding mode adopted by the SRS carried on the target SRS resource determined by the terminal according to the CSI-RSs carried on the K CSI-RS resources, respectively.

Alternatively, the terminal may determine the plurality of covariance matrices by any one of the following three.

Firstly, the terminal can determine K groups of first covariance matrixes according to the CSI-RS representation channel measurement information carried on the first CSI-RS resource in the K CSI-RS resources and the CSI-RS representation interference information carried on other CSI-RS resources except the first CSI-RS resource in the K CSI-RS resources. The first CSI-RS resource traverses K CSI-RS resources, and each group of first covariance matrixes in the K groups of first covariance matrixes comprises a channel covariance matrix and K-1 interference covariance matrixes.

Secondly, the terminal may determine K sets of second covariance matrices according to CSI-RS characterizing channel measurement information carried on a first CSI-RS resource of the K CSI-RS resources. The first CSI-RS resource traverses K CSI-RS resources, and each group of the K groups of second covariance matrixes comprises a channel covariance matrix.

Thirdly, the terminal can determine K groups of first covariance matrixes according to the CSI-RS representation channel information carried on the first CSI-RS resource in the K groups of CSI-RS resources and the CSI-RS representation interference information carried on other CSI-RS resources except the first CSI-RS resource in the K groups of CSI-RS resources, wherein each group of first covariance matrixes in the K groups of first covariance matrixes comprises a channel covariance matrix and K-1 interference covariance matrixes; moreover, the terminal can determine K groups of second covariance matrixes according to the CSI-RS representation channel information carried on the first CSI-RS resource in the K CSI-RS resources, wherein each group of the K groups of second covariance matrixes comprises one channel covariance matrix. Wherein the first CSI-RS resource traverses the K CSI-RS resources.

Optionally, the network device may instruct the terminal to determine the plurality of covariance matrices by configuring the covariance matrices.

It can be seen that, based on the plurality of covariance matrices determined by any one of the first to third methods, the precoding scheme with the best channel state finally determined is either the precoding scheme determined by the first determining method or the precoding scheme determined by the second determining method.

Determination method 1

And determining a precoding mode adopted by the SRS carried on the target SRS resource based on CSI-RS representation channel measurement information carried on a first target resource and CSI-RS representation interference information carried on a second target resource, wherein the first target resource is one CSI-RS resource in the K CSI-RS resources, and the second target resource is all the other CSI-RS resources except the first target resource in the K CSI-RS resources.

Determination of mode two

And determining a precoding mode adopted by the SRS carried on the target SRS resource based on CSI-RS characterization channel measurement information carried on a third target resource, wherein the third target resource is one CSI-RS resource in the K CSI-RS resources.

The terminal may determine K sets of first covariance matrices according to CSI-RS characterizing channel measurement information carried on a first CSI-RS resource of the K CSI-RS resources and CSI-RS characterizing interference information carried on other CSI-RS resources except the first CSI-RS resource of the K CSI-RS resources, and specifically may include: firstly, based on the K-th CSI-RS resource in the K CSI-RS resources₁The CSI-RS carried on each CSI-RS resource characterizes the channel measurement information and is based on the kth₂Individual CSI-RS resource to kth_KThe CSI-RS carried on the CSI-RS resources represents interference information, and a channel covariance matrix and K-1 interference covariance matrices (namely, a group of first covariance matrices) are determined; then, based on K th CSI-RS resource in K CSI-RS resources₂The CSI-RS carried on each CSI-RS resource characterizes the channel measurement information and is based on the kth₁And k₃-k_KThe CSI-RS carried on the CSI-RS resources represents interference information, and a channel covariance matrix and K-1 interference covariance matrices (namely, a group of first covariance matrices) are determined; then, based on the K-th CSI-RS resource in the K CSI-RS resources₃The CSI-RS carried on each CSI-RS resource characterizes the channel measurement information and is based on the kth₁、k₂And k₄-k_KThe CSI-RS carried on the CSI-RS resources represents interference information, and a channel covariance matrix and K-1 interference covariance matrices (namely, a group of first covariance matrices) are determined; … …, respectively; until K sets of first covariance matrices are determined.

The terminal may determine K sets of second covariance matrices according to CSI-RS characterization channel measurement information carried on a first CSI-RS resource of the K CSI-RS resources, which may specifically include:

firstly, based on the K-th CSI-RS resource in the K CSI-RS resources₁The CSI-RS carried on the CSI-RS resources represents channel measurement information and determines a group of second covariance matrixes; then, based on K th CSI-RS resource in K CSI-RS resources₂The CSI-RS carried on the CSI-RS resources represents channel measurement information and determines a group of second covariance matrixes; then, based on the K-th CSI-RS resource in the K CSI-RS resources₃The CSI-RS carried on the CSI-RS resources represents channel measurement information and determines a group of second covariance matrixes; … …, respectively; until K sets of second covariance matrices are determined.

Further optionally, the determining, by the terminal, a precoding mode with a best channel state based on the first determined K groups of first covariance matrices may specifically include:

and step 11, according to all port allocation modes of the K groups of first covariance matrixes, traversing the ports of the target SRS to be allocated to the plurality of network devices, and determining a precoding mode of each group of first covariance matrixes in each port allocation mode in all port allocation modes.

And step 12, for all the precoding modes determined in the step 11, determining the precoding mode with the best channel state from all the precoding modes according to the channel state parameters corresponding to each precoding mode in all the precoding modes.

It should be noted that, since the precoding scheme determined in step 11 is determined based on the first covariance matrix, the precoding scheme with the best channel state determined in step 12 also corresponds to one first covariance matrix. Therefore, the CSI-RS resource carrying the CSI-RS for determining the channel covariance matrix in the first covariance matrix is the first target resource, and the CSI-RS resource carrying the CSI-RS for determining the interference covariance matrix in the first covariance matrix is the second target resource.

Further optionally, the determining, by the terminal, a precoding mode with the best channel state based on the second determined K groups of second covariance matrices may specifically include:

and step 13, traversing all port allocation modes of the target SRS, which are allocated to a single network device, by the ports according to the K groups of second covariance matrices, and determining a precoding mode of each group of second covariance matrices in each port allocation mode in all port allocation modes.

And step 14, for all the precoding modes determined in the step 13, determining the precoding mode with the best channel state from all the precoding modes according to the channel state parameters corresponding to each precoding mode in all the precoding modes.

It should be noted that, since the precoding scheme determined in step 13 is determined based on the second covariance matrix, the precoding scheme with the best channel state determined in step 14 also corresponds to one second covariance matrix. Therefore, the CSI-RS resource carrying the CSI-RS for determining the CSI-RS in the second covariance matrix (i.e., the channel covariance matrix) is the third target resource.

Further, optionally, the terminal determines a precoding mode with the best channel state based on the third determined K sets of second covariance matrices of the K sets of first covariance matrices, which may specifically include:

step 15, according to the K groups of first covariance matrices, traversing all port allocation manners (hereinafter, may be referred to as port allocation manner 1) in which the terminal transmits SRS to the plurality of network devices based on the target SRS resource, and determining a precoding manner of each group of first covariance matrices in each port allocation manner of all port allocation manners.

Step 16, according to the K groups of second covariance matrices, traversing all port allocation manners (hereinafter, may be referred to as port allocation manner 2) in which the terminal sends the SRS to a single network device based on the target SRS resource, and determining a precoding manner of each group of second covariance matrices in each port allocation manner in all port allocation manners.

And step 17, determining the precoding mode with the best channel state from all the precoding modes according to the channel state parameters corresponding to each precoding mode in all the precoding modes for all the precoding modes determined in the steps 15 and 16.

It should be noted that, since the precoding scheme is determined according to the first covariance matrix in step 15 and the precoding scheme is determined according to the second covariance matrix in step 16, the precoding scheme with the best channel state determined in step 17 also corresponds to one first covariance matrix or one second covariance matrix. Therefore, when a first covariance matrix corresponds to a CSI-RS resource, which carries a CSI-RS for determining a channel covariance matrix in the first covariance matrix, is the first target resource, and a CSI-RS resource, which carries a CSI-RS for determining an interference covariance matrix in the first covariance matrix, is the second target resource. When the second covariance matrix corresponds to one second covariance matrix, the CSI-RS resource used for determining the CSI-RS in the second covariance matrix (i.e., the channel covariance matrix) is the third target resource.

In the following, for example, K is equal to 2, 2 CSI-RS resources are CSI-RS resource 1 and CSI-RS resource 2, CSI-RS resource 1 is CSI-RS resource of network device 1, CSI-RS resource 2 is CSI-RS resource of network device 2, CSI-RS1 is carried on CSI-RS resource 1, CSI-RS2 is carried on CSI-RS resource 2, and multiple covariance matrices are determined based on the third method, and the maximum number of ports is 4.

Since the maximum port number is 4, all the port number allocation manners of the port allocation manner 1 may specifically include: { network device 1: 1; network device 2:1}, { network device 1: 2; network device 2:1}, { network device 1: 3; network device 2:1}, { network device 1: 1; network device 2:2}, { network device 1: 1; network device 2:3 and { network device 1: 2; network device 2:2 }. Wherein { network device 1: 1; network device 2:1 may indicate that the number of ports for transmitting SRS on the target SRS resource is 2, and one of the 2 ports corresponds to network device 1. { network devices 1: 2; network device 2:1 may represent that the number of ports for transmitting SRS on the target SRS resource is 3, two of the 3 ports correspond to network device 1, and the other of the 3 ports corresponds to network device 2. { network devices 1: 3; network device 2:1 may represent that the number of ports for transmitting SRS on the target SRS resource is 4, three of the 4 ports correspond to network device 1, and another of the 4 ports corresponds to network device 2. { network device 1: 1; network device 2:2 may indicate that the number of ports for transmitting SRS on the target SRS resource is 3, one of the 3 ports corresponds to network device 1, and the other two ports of the 3 ports correspond to network device 2. { network device 1: 1; network device 2:3 may represent that the number of ports for transmitting SRS on the target SRS resource is 4, one of the 4 ports corresponds to network device 1, and the other three of the 4 ports correspond to network device 2. { network devices 1: 2; network device 2:2 may represent that the number of ports for transmitting SRS on the target SRS resource is 4, two of the 4 ports correspond to network device 1, and the other two of the 4 ports correspond to network device 2.

Since the maximum port number is 4, all the port number allocation manners of the port allocation manner 2 may specifically include: { network devices 1: 0; network device 2:1}, { network device 1: 0; network device 2:2}, { network device 1: 0; network device 2:3}, { network device 1: 0; network device 2:4}, { network device 1: 1; network device 2:0}, { network device 1: 2; network device 2:0}, { network device 1: 3; network device 2:0 and { network device 1: 4; network device 2:0 }. It should be noted that, for the specific description of the port number allocation manner of the port allocation manner 2, reference may be made to the specific description of the port number allocation manner of the port allocation manner 1, and details thereof are not repeated here.

Specifically, the terminal may determine, based on the channel covariance matrix obtained according to the CSI-RS1 and the interference covariance matrix obtained according to the CSI-RS2, a precoding scheme of a port that transmits the SRS to the network device 1 based on the target SRS in all port number allocation schemes of the port allocation scheme 1. Moreover, the terminal may determine, based on the channel covariance matrix obtained from the CSI-RS2, a precoding scheme of a port that transmits an SRS to the network device 2 based on the target SRS among all port number allocation schemes of the port allocation scheme 1 according to the interference covariance matrix obtained from the CSI-RS 1. The port number is distributed in a { network device 1: 1; for example, the network device 2:1, the precoding method of 1 port of the network device 1 may be determined based on a channel covariance matrix obtained according to CSI-RS1 and an interference covariance matrix obtained according to CSI-RS2, and the precoding method of 1 port of the network device 2 may be determined based on a channel covariance matrix obtained according to CSI-RS2 and an interference covariance matrix obtained according to CSI-RS 1.

Optionally, the network device may further instruct the terminal to adopt one or more port allocation manners of all the port number allocation manners of the port allocation manner 1 through configuration. Alternatively, the terminal may determine, based on the channel covariance matrix obtained from the CSI-RS1 and the interference covariance matrix obtained from the CSI-RS2, a precoding scheme of a port, which transmits the SRS to the network device 1 based on the target SRS, in the port number allocation scheme of the port allocation scheme 1 indicated by the network device. And the terminal may determine, based on the channel covariance matrix obtained from the CSI-RS2, a precoding scheme of a port, which is based on the target SRS and transmits the SRS to the network device 2, in the port number allocation scheme of the port allocation scheme 1 indicated by the network device according to the interference covariance matrix obtained from the CSI-RS 1. Here, the network device further instructs the terminal to adopt one or more port allocation manners of all the port number allocation manners of the port allocation manner 1 through configuration, so that the computational complexity of the terminal for computing the SRS precoding manner can be reduced.

Further, the terminal may determine, based on the channel covariance matrix obtained according to the CSI-RS1, a precoding scheme of a port that transmits the SRS to the network device 1 based on the target SRS in all port number allocation schemes of the port allocation scheme 2. Moreover, the terminal may determine, based on the channel covariance matrix obtained from the CSI-RS2, a precoding scheme of a port that transmits the SRS to the network device 2 based on the target SRS among all port number allocation schemes of the port allocation scheme 2. The port number is distributed in a { network device 1: 0; network device 2:1, for example, no port is allocated to network device 1, and the precoding matrix for 1 port of network device 2 may be determined based on the channel covariance matrix obtained from CSI-RS 2.

Optionally, the network device may further instruct the terminal to adopt one or more port allocation manners of all the port number allocation manners of the port allocation manner 2 through configuration. Alternatively, the terminal may determine, based on the channel covariance matrix obtained from the CSI-RS1, a precoding scheme of a port, which is used for transmitting the SRS to the network device 1 based on the target SRS, in the port number allocation scheme of the port allocation scheme 2 indicated by the network device. Moreover, the terminal may determine, based on the channel covariance matrix obtained from the CSI-RS2, a precoding scheme of a port to transmit the SRS to the network device 2 based on the target SRS in the port number allocation scheme of the port allocation scheme 2 indicated by the network device. Here, the network device further instructs the terminal to adopt one or more port allocation manners of all the port number allocation manners of the port allocation manner 2 through configuration, so that the computational complexity of the terminal for computing the SRS precoding manner can be reduced.

Finally, the terminal can compare the channel state parameters corresponding to each precoding mode in all precoding modes to determine the precoding mode with the best corresponding channel state. For example, assume that the port number allocation method for determining the precoding method with the best channel state is { network device 1: 4; network device 2: 0), the terminal transmits SRS on the target SRS resource according to the precoding scheme 3 with the best channel state, which may be specifically shown in fig. 8A. For example, assume that the port number allocation method for determining the precoding method with the best channel state is { network device 1: 2; network device 2:2}, the terminal sends the SRS on the target SRS resource according to the best precoding manner of the channel state, which may be specifically shown in fig. 8B.

Optionally, when the target SRS resource includes multiple SRS resources, the determining manner of the precoding manner used for determining the SRS carried on each SRS resource in the multiple SRS resources may be the same. Further optionally, the precoding manners adopted by the SRS loaded on each of the multiple SRS resources are determined based on the first determination manner or the second determination manner. Here, since what transmission method is used (for example, only transmission with the network device 1, or simultaneous transmission with the network device 1 and the network device 2) is determined by the terminal in real time based on channel measurement, the determination methods of the precoding methods used by the SRSs carried on each SRS resource in the plurality of SRS resources may be the same, and thus, the problem that the network device cannot determine how to select the SRS resource for uplink data transmission because the determination methods of the precoding methods carried on the SRS resources are not unified can be avoided.

And 604, the terminal sends the SRS on the target SRS resource according to the determined precoding mode.

In this step, when the target SRS resource may correspond to the K transmission parameters, step 603 may specifically include: and sending the SRS on the target SRS resource according to the determined precoding mode and one target transmission parameter in the K transmission parameters. Optionally, the K transmission parameters correspond to the K CSI-RS resources one to one.

Further, the determination of the precoding manner of the SRS carried by the target SRS resource may be based on CSI-RSs carried on the multiple CSI-RS resources, so that the precoding manner determined by the terminal may correspond to the multiple CSI-RS resources. Therefore, in order to facilitate the terminal to determine the transmission parameters used for sending the SRS on the target SRS resource according to the precoding manner, optionally, the target transmission parameters may be transmission parameters corresponding to a target resource of the K CSI-RS resources, where the target resource carries CSI-RS representing channel measurement information. Specifically, when the precoding manner determined by the terminal in step 604 is a precoding manner finally determined based on the determination manner, the target resource may be the first target resource, for example, if the precoding manner determined by the terminal in step 604 is determined according to SRS-characterized channel measurement information carried on SRS resource 1, and SRS-characterized interference information carried on SRS resource 2, then SRS resource 1 is the target resource. When the precoding method determined by the terminal in step 604 is the precoding method finally determined based on the second determination method, the target resource may be a third target resource, and if the precoding method determined by the terminal in step 604 is determined according to the SRS-characterized channel measurement information carried on the SRS resource 2, the SRS resource 2 is the target resource.

Step 605, the network device receives, from the terminal, an SRS carried on the target SRS resource.

In this step, optionally, when there are multiple network devices in fig. 1, step 605 may specifically be that each network device in all the network devices decodes on the target SRS resource to receive the SRS on the target SRS resource. And, a target network device of all the network devices may receive, from the terminal, the SRS carried on the target SRS resource. The target network device may correspond to the precoding method determined by the terminal in step 603. For example, for fig. 8A, the target network device may be network device 1. Also for example, for fig. 8B the target network devices may be network device 1 and network device 2.

Optionally, when the time domain type of the target SRS resource may be aperiodic, the network device may trigger sending the SRS on the target SRS resource by sending the DCI. Further, the method of this embodiment may further include the steps of: the network equipment sends K DCIs, the K DCIs correspond to the K CSI-RS resources one by one, and the K DCIs are used for indicating to trigger the terminal to send the SRS on the target SRS resource. Optionally, the DCI corresponding to one CSI-RS resource may be sent by a network device corresponding to the CSI-RS resource, and further, when the number of the network devices in fig. 1 is multiple, the correspondence between all the network devices and the K CSI-RS resources may include that one network device corresponds to one CSI-RS resource, and/or that one network device corresponds to multiple CSI-RS resources. Therefore, the sending, by the network device, the K pieces of DCI may specifically include: all the network devices transmit the DCI corresponding to the CSI-RS resources corresponding to the network devices.

Optionally, the K pieces of DCI are further configured to indicate to trigger the terminal to receive CSI-RS on corresponding CSI-RS resources. Accordingly, the network device transmitting the K pieces of DCI may precede the network device transmitting the CSI-RS. At this time, after the terminal receives the DCI corresponding to one CSI-RS resource, the CSI-RS resource may be decoded by the terminal. Here, the K pieces of DCI are further used to indicate to trigger the terminal to receive the CSI-RS on the corresponding CSI-RS resource, so that resource overhead caused by the network device indicating to trigger the terminal to receive the CSI-RS on the corresponding CSI-RS resource through other information can be avoided.

Alternatively, when the K CSI-RS resources correspond to multiple network devices, whether the network devices corresponding to the CSI-RS resources are the same may be distinguished through spatial filtering information respectively indicated in the K DCI. For example, when the network devices corresponding to the two CSI-RS resources corresponding to the two DCIs are the same, the beam directions corresponding to the spatial filtering information indicated by the two DCIs are the same; when the network devices corresponding to the two CSI-RS resources corresponding to the two DCIs are different, the beam directions corresponding to the spatial filtering information indicated by the two DCIs are different.

Correspondingly, the terminal receives the K pieces of DCI.

Optionally, the K pieces of DCI may be carried in the same time unit, or the K pieces of DCI may be carried in different time units. The time unit may represent a scheduled time unit, and optionally, the time unit may be a slot (slot), an Orthogonal Frequency Division Multiplexing (OFDM) symbol set, or the like.

When the time domain type of the target SRS resource is the aperiodic type, the network device may instruct the trigger terminal to transmit the SRS on the target SRS resource by transmitting K pieces of DCI, and the terminal may transmit the SRS on the target SRS resource by using a time unit in which the K pieces of DCI are located as a reference and biasing according to a pre-configured time unit.

When the K pieces of DCI are carried in the same time unit, the time units in which the K pieces of DCI are located are determined as references, and the transmission timings of transmitting the SRS on the target SRS resource are the same, which may indicate that the terminal needs to transmit the SRS to the network devices corresponding to the K pieces of CSI-RS resources on the target SRS resource at the same transmission timing. At this time, it can be understood that the network device allows the terminal to transmit uplink data to the network device based on the plurality of SRS resources. Therefore, optionally, when the K DCIs are carried in the same time unit, the terminal may determine the multiple covariance matrices based on the first one of the three above-mentioned determinations. On the basis that the terminal determines a plurality of covariance matrixes based on the first method, the precoding mode determined by the terminal and having the best channel state is the precoding matrix determined by the first determining mode. Therefore, the determining, by the terminal, the precoding manner adopted by the SRS carried on the target SRS resource according to the CSI-RSs carried on the K CSI-RSs, includes: and determining a precoding mode adopted by the SRS carried on the target SRS resource based on CSI-RS representation channel measurement information carried on a first target resource and CSI-RS representation interference information carried on a second target resource, wherein the first target resource is one CSI-RS resource in the K CSI-RS resources, and the second target resource is all the other CSI-RS resources except the first target resource in the K CSI-RS resources.

When the K pieces of DCI are carried in different time units, the time units in which the K pieces of DCI are located as references determine that the SRS is transmitted on the target SRS resource at different transmission timings, which may indicate that the terminal needs to transmit the SRS to the network devices corresponding to the K pieces of CSI-RS resources on the target SRS resource at different transmission timings. At this time, it may be understood that the network device does not allow the terminal to transmit uplink data to the network device based on the plurality of SRS resources. Therefore, optionally, when the K DCIs are carried in different time units, the terminal may determine a plurality of covariance matrices based on the second one of the three above-mentioned determinations. And on the basis that the terminal determines a plurality of covariance matrixes based on the second type, the precoding mode with the best channel state determined by the terminal is the precoding matrix determined by the second determination mode. Therefore, the determining, according to the CSI-RS carried on the K CSI-RSs, the precoding manner adopted by the SRS carried on the target SRS resource includes: and determining a precoding mode adopted by the SRS carried on the target SRS resource based on CSI-RS characterization channel measurement information carried on a third target resource, wherein the third target resource is one CSI-RS resource in the K CSI-RS resources.

In the embodiment, the configuration information is sent by the network equipment and used for indicating the target SRS resource, the target SRS resource is associated with K CSI-RS resources, K is an integer larger than 1, the terminal determines the precoding mode adopted by the SRS carried on the target SRS resource according to the CSI-RS carried on the K CSI-RS resources respectively, and the terminal sends the SRS on the target SRS resource according to the determined precoding mode, so that the terminal determines the precoding mode adopted by the SRS carried on the target SRS resource by comprehensively considering the mutual influence of the CSI-RSs carried on the multiple CSI-RS resources, the precoding mode which enables the transmission performance to be better can be selected, and the transmission performance is improved.

Fig. 9 is a schematic structural diagram of an information receiving apparatus according to an embodiment of the present application. The information receiving apparatus according to the present embodiment can be applied to a network device. The information receiving apparatus may be configured to perform the functions of the network device in the method embodiment shown in fig. 6. As shown in fig. 9, the information receiving apparatus may include: a transmitting module 11 and a receiving module 12. Wherein the content of the first and second substances,

a sending module 11, configured to send configuration information, where the configuration information is used to indicate a target sounding reference signal, SRS, resource, the target SRS resource is associated with K channel state information reference signal, CSI-RS, resources, and K is an integer greater than 1; the K CSI-RS resources are used for determining a precoding mode adopted by an SRS loaded on the target SRS resource;

a receiving module 12, configured to receive an SRS carried on the target SRS resource.

In a possible implementation, the determining a precoding manner adopted by the SRS carried on the target SRS resource includes one of the following two determination manners:

a precoding mode adopted by an SRS carried on the target SRS resource is determined based on CSI-RS representation channel measurement information carried on a first target resource and CSI-RS representation interference information carried on a second target resource, wherein the first target resource is one CSI-RS resource in the K CSI-RS resources, and the second target resource is all the other CSI-RS resources except the first target resource in the K CSI-RS resources;

alternatively, the first and second electrodes may be,

In a possible implementation, the configuration information is further used to indicate K transmission parameters corresponding to the target SRS resource, and the SRS carried on the target SRS resource is sent based on one target transmission parameter of the K transmission parameters.

In a possible implementation, the target transmission parameter is a transmission parameter corresponding to a target resource of the K CSI-RS resources, and the target resource carries a CSI-RS characterizing channel measurement information.

In a possible implementation, the sending module 11 is further configured to send K pieces of DCI, where the K pieces of DCI correspond to the K pieces of CSI-RS resources one to one, and the K pieces of DCI are used to indicate to trigger the terminal to send an SRS on the target SRS resource.

In one possible implementation, the K pieces of DCI are further used to indicate that the terminal is triggered to receive CSI-RS on corresponding CSI-RS resources.

In one possible implementation, the K DCIs are carried in the same time unit;

the precoding mode adopted by the SRS carried on the target SRS resource is determined based on CSI-RS representation channel measurement information carried on a first target resource and CSI-RS representation interference information carried on a second target resource, wherein the first target resource is one CSI-RS resource in the K CSI-RS resources, and the second target resource is all the other CSI-RS resources except the first target resource in the K CSI-RS resources.

In one possible implementation, the K DCIs are carried in different time units;

In one possible implementation, the configuration information is specifically used to indicate an SRS resource set;

the set of SRS resources includes N SRS resources including the target SRS resource, the N SRS resources are associated with M CSI-RS resources including the K CSI-RS resources, N is a positive integer and M is a positive integer less than or equal to K.

In one possible implementation, K is equal to M, and each SRS resource in the set of SRS resources is associated with the K CSI-RS resources.

The information receiving apparatus provided in the embodiment of the present application may perform the actions of the network device in the foregoing method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 10 is a schematic structural diagram of an information sending apparatus according to an embodiment of the present application. The information transmission device according to the present embodiment can be applied to a terminal. The information sending apparatus may be configured to perform the functions of the terminal in the method embodiment shown in fig. 6. As shown in fig. 10, the information transmitting apparatus may include: a receiving module 21, a processing module 22 and a transmitting module 23. Wherein the content of the first and second substances,

a receiving module 21, configured to receive configuration information, where the configuration information is used to indicate a target sounding reference signal, SRS, resource, the target SRS resource is associated with K channel state information reference signal, CSI-RS, resources, and K is an integer greater than 1; the K CSI-RS resources are used for the terminal to determine a precoding mode adopted by an SRS loaded on the target SRS resource;

a processing module 22, configured to determine, according to the CSI-RSs respectively carried on the K CSI-RSs, a precoding manner adopted by the SRS carried on the target SRS resource;

a sending module 23, configured to send an SRS on the target SRS resource according to the determined precoding manner.

In a possible implementation, the determining, according to the CSI-RSs respectively carried on the K CSI-RSs, a precoding manner adopted by the SRS carried on the target SRS resource includes one of the following two determination manners:

determining a precoding mode adopted by an SRS carried on a target SRS resource based on CSI-RS representation channel measurement information carried on a first target resource and CSI-RS representation interference information carried on a second target resource, wherein the first target resource is one CSI-RS resource in the K CSI-RS resources, and the second target resource is all the other CSI-RS resources except the first target resource in the K CSI-RS resources;

alternatively, the first and second electrodes may be,

In a possible implementation, the configuration information is further used to indicate K transmission parameters corresponding to the target SRS resource;

a sending module 23, configured to send an SRS on the target SRS resource according to the determined precoding scheme and a target transmission parameter of the K transmission parameters.

In a possible implementation, the receiving module 21 is further configured to receive K pieces of DCI, where the K pieces of DCI correspond to the K pieces of CSI-RS resources one to one, and the K pieces of DCI are used to indicate to trigger the terminal to transmit an SRS on the target SRS resource.

In one possible implementation, the K DCIs are carried in the same time unit;

the determining a precoding mode adopted by the SRS loaded on the target SRS resource according to the CSI-RSs respectively loaded on the K CSI-RSs comprises: and determining a precoding mode adopted by the SRS carried on the target SRS resource based on CSI-RS representation channel measurement information carried on a first target resource and CSI-RS representation interference information carried on a second target resource, wherein the first target resource is one CSI-RS resource in the K CSI-RS resources, and the second target resource is all the other CSI-RS resources except the first target resource in the K CSI-RS resources.

In one possible implementation, the K DCIs are carried in different time units;

the determining a precoding mode adopted by the SRS carried on the target SRS resource according to the CSI-RS carried on the K CSI-RSs includes:

In one possible implementation, the configuration information is specifically used to indicate an SRS resource set, where the SRS resource set includes N SRS resources, the N SRS resources include the target SRS resource, the N SRS resources are associated with M CSI-RS resources, the M CSI-RS resources include the K CSI-RS resources, N is a positive integer, and M is a positive integer less than or equal to K.

The information sending apparatus provided in the embodiment of the present application may execute the actions of the terminal in the foregoing method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.

It should be noted that the receiving module and the sending module may be transceivers when actually implemented. The processing module can be realized in the form of software called by the processing element; or may be implemented in hardware. For example, the processing module may be a processing element separately set up, or may be implemented by being integrated in a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and a function of the processing module may be called and executed by a processing element of the apparatus. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when some of the above modules are implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor that can call program code. As another example, these modules may be integrated together, implemented in the form of a system-on-a-chip (SOC).

Fig. 11 is a schematic structural diagram of an information receiving apparatus according to an embodiment of the present application. As shown in fig. 11, the information receiving apparatus may include: a processor 31 (e.g., CPU), a memory 32, a transceiver 33; the transceiver 33 is coupled to the processor 31, and the processor 31 controls the transceiving action of the transceiver 33; the memory 32 may include a random-access memory (RAM) and may further include a non-volatile memory (NVM), such as at least one disk memory, and the memory 32 may store various instructions for performing various processing functions and implementing the method steps of the present application. The information receiving device of the present application may further include a communication bus 34, for example. The transceiver 33 may be integrated in the transceiver of the information receiving apparatus, or may be a separate transceiving antenna on the information receiving apparatus. The communication bus 34 is used to realize communication connections between the elements.

In the embodiment of the present application, the memory 32 is used for storing computer executable program codes, and the program codes comprise instructions; when the processor 31 executes the instruction, the instruction causes the processor 31 of the information receiving apparatus to execute the processing action of the network device in the above-mentioned embodiment or the optional embodiment, and causes the transceiver 33 to execute the transceiving action of the network device in the above-mentioned method embodiment, which has similar implementation principle and technical effect, and is not described herein again.

Fig. 12 is a schematic structural diagram of an information sending apparatus according to an embodiment of the present application. As shown in fig. 12, the information transmitting apparatus may include: a processor 41 (e.g., CPU), memory 42, transceiver 43; the transceiver 43 is coupled to the processor 41, and the processor 41 controls the receiving action of the transceiver 43; the memory 42 may include a random-access memory (RAM) and a non-volatile memory (NVM), such as at least one disk memory, and the memory 42 may store various instructions for performing various processing functions and implementing the method steps of the present application. For example, the information transmitting apparatus according to the present application may further include: a power supply 44, a communication bus 45, and a communication port 46. The transceiver 43 may be integrated in the transceiver of the information transmission device or may be a separate transmitting/receiving antenna on the information transmission device. The communication bus 45 is used to realize communication connection between the elements. The communication port 46 is used for connection and communication between the information transmission device and other peripheral devices.

In the embodiment of the present application, the memory 42 is used for storing computer executable program codes, and the program codes include instructions; when the processor 41 executes the instruction, the instruction causes the processor 41 of the information sending apparatus to execute the processing action of the terminal in the above-mentioned method embodiment, and causes the transceiver 43 to execute the transceiving action of the terminal in the above-mentioned method embodiment or the alternative embodiment, which has similar implementation principle and technical effect, and is not described herein again.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The term "plurality" herein means two or more. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship; in the formula, the character "/" indicates that the preceding and following related objects are in a relationship of "division".

Claims

1. An information receiving method, applied to a network device, the method comprising:

sending configuration information, wherein the configuration information is used for indicating a target Sounding Reference Signal (SRS) resource, the target SRS resource is associated with K channel state information reference signal (CSI-RS) resources, and K is an integer greater than 1; the K CSI-RS resources are used for determining a precoding mode adopted by an SRS loaded on the target SRS resource;

receiving an SRS carried on the target SRS resource.

2. The method of claim 1, wherein the determining the precoding scheme used for the SRS carried on the target SRS resource comprises one of the following two determination schemes:

alternatively, the first and second electrodes may be,

3. The method of claim 2, wherein the target SRS resources include a plurality of SRS resources.

4. The method according to any of claims 1-3, wherein the configuration information is further used to indicate K transmission parameters corresponding to the target SRS resource, and the SRS carried on the target SRS resource is transmitted based on one of the K transmission parameters.

5. The method of claim 4, the K transmission parameters are in one-to-one correspondence with the K CSI-RS resources.

6. The method according to claim 4 or 5, wherein the target transmission parameter is a transmission parameter corresponding to a target resource of the K CSI-RS resources, and the target resource carries a CSI-RS characterizing channel measurement information.

7. The method according to any one of claims 1-6, further comprising:

and sending K DCIs, wherein the K DCIs correspond to the K CSI-RS resources one by one, and the K DCIs are used for indicating a trigger terminal to send the SRS on the target SRS resource.

8. The method of claim 7, wherein the K DCI are further configured to indicate a trigger for the terminal to receive CSI-RS on corresponding CSI-RS resources.

9. The method of claim 7 or 8, wherein the K DCI are carried in the same time unit;

10. The method of claim 7 or 8, wherein the K DCI are carried in different time units;

11. The method according to any of claims 1-10, wherein the configuration information is specifically used for indicating a set of SRS resources;

12. The method of claim 11, wherein K is equal to M, and wherein each SRS resource in the set of SRS resources is associated with the K CSI-RS resources.

13. An information sending method, applied to a terminal, the method comprising:

receiving configuration information, wherein the configuration information is used for indicating a target Sounding Reference Signal (SRS) resource, the target SRS resource is associated with K channel state information reference signal (CSI-RS) resources, and K is an integer greater than 1; the K CSI-RS resources are used for the terminal to determine a precoding mode adopted by an SRS loaded on the target SRS resource;

determining a precoding mode adopted by the SRS loaded on the target SRS resource according to the CSI-RSs respectively loaded on the K CSI-RSs;

and sending the SRS on the target SRS resource according to the determined precoding mode.

14. The method according to claim 13, wherein the determining the precoding scheme adopted by the SRS loaded on the target SRS resource according to the CSI-RSs loaded on the K CSI-RSs respectively comprises one of the following two determination schemes:

alternatively, the first and second electrodes may be,

15. The method of claim 14, wherein the target SRS resources include a plurality of SRS resources.

16. The method according to any of claims 13-15, wherein the configuration information is further used to indicate K transmission parameters corresponding to the target SRS resource;

the transmitting the SRS on the target SRS resource according to the determined precoding method includes:

and sending the SRS on the target SRS resource according to the determined precoding mode and one target transmission parameter in the K transmission parameters.

17. The method of claim 16, the K transmission parameters correspond one-to-one with the K CSI-RS resources.

18. The method according to claim 16 or 17, wherein the target transmission parameter is a transmission parameter corresponding to a target resource of the K CSI-RS resources, and the target resource carries a CSI-RS characterizing channel measurement information.

19. The method according to any of claims 13-15, wherein before transmitting SRS on the target SRS resource, further comprising:

receiving K DCIs, wherein the K DCIs correspond to the K CSI-RS resources one by one, and the K DCIs are used for indicating to trigger the terminal to transmit the SRS on the target SRS resource.

20. The method of claim 19, wherein the K DCI are further configured to indicate a trigger for the terminal to receive CSI-RS on corresponding CSI-RS resources.

21. The method of claim 19 or 20, wherein the K DCI are carried in the same time unit;

22. The method of claim 19 or 20, wherein the K DCI are carried in different time units;

23. The method according to any of claims 13-22, wherein the configuration information is specifically configured to indicate a set of SRS resources, wherein the set of SRS resources comprises N SRS resources, wherein the N SRS resources comprise the target SRS resource, wherein the N SRS resources are associated with M CSI-RS resources, wherein the M CSI-RS resources comprise the K CSI-RS resources, wherein N is a positive integer and M is a positive integer smaller than or equal to K.

24. The method of claim 23, wherein K is equal to M, and wherein each SRS resource in the set of SRS resources is associated with the K CSI-RS resources.

25. An information receiving apparatus, applied to a network device, the apparatus comprising:

a sending module, configured to send configuration information, where the configuration information is used to indicate a target Sounding Reference Signal (SRS) resource, the target SRS resource is associated with K channel state information reference signal (CSI-RS) resources, and K is an integer greater than 1; the K CSI-RS resources are used for determining a precoding mode adopted by an SRS loaded on the target SRS resource;

a receiving module, configured to receive an SRS carried on the target SRS resource.

26. An information transmission apparatus, applied to a terminal, the apparatus comprising:

a receiving module, configured to receive configuration information, where the configuration information is used to indicate a target Sounding Reference Signal (SRS) resource, the target SRS resource is associated with K channel state information reference signal (CSI-RS) resources, and K is an integer greater than 1; the K CSI-RS resources are used for the terminal to determine a precoding mode adopted by an SRS loaded on the target SRS resource;

the processing module is used for determining a precoding mode adopted by the SRS loaded on the target SRS resource according to the CSI-RSs respectively loaded on the K CSI-RSs;

and a sending module, configured to send an SRS on the target SRS resource according to the determined precoding manner.

27. A computer-readable storage medium storing a computer program or instructions for causing a computer to perform the method of any one of claims 1 to 12 when the computer program or instructions is run on the computer.

28. A computer-readable storage medium storing a computer program or instructions for causing a computer to perform the method of any one of claims 13 to 24 when the computer program or instructions is run on the computer.

29. A computer program product, which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 12.

30. A computer program product, which, when run on a computer, causes the computer to perform the method of any one of claims 13 to 24.